Using JavaScript To Call PHP Database Routines Between Windows

In an effort to bring high ease of use, some of us provide a HTML styled select or drop-down list
of selections the user can make. It's not too hard to have PHP build a variable that holds a select
option list such as:

We might (I do) have a button on a main screen that says [Select Contact] for the user to make
their selection in a second window. This first window has a JavaScript function that opens a PHP
page to bring back a number of values from the Contacts database like Company and Name, as read
via a key value the user can supply in a form.

The first screen then contains this JavaScript function to just go "read" a Contacts record.
The PHP screen GetVals.php is my own database read-and-post-back generic utility.